Cylinder sleeve puller



G. lvLwALRAvEN ETAL 2,566,507

CYLINDER SLEEVE PULLER Sept. 4, 1951 Filed Sept. 23. 1947 Patented Sept.4, 195i CYLINDER SLEEVE FULLER George M. Walraven and Raymond Knudsen,

Kenosha, Wis., asslgnors to Snap-n Tools Corporation, Kenosha, Wis., acorporation of Delaware Application September 23, 1947, Serial No.775,718

1 Claim. 1

This invention relates to pullers and more particularly .to cylindersleeve pullers, although certain features thereof may be employed withequal advantage for other purposes.

It contemplates more especially the provision of improved pullersinvolving adjustable tiltable engaging jaws that are effectively adaptedto the pulling of cylinder sleeves.

Sleeve pullers are becoming increasingly popular owing to the fact thatmany internal combustion engines now resort to cylinder sleeves asliners rather than provide precision cylinders directly in the engineblock. In rebuilding engines, it is only necessary to remove thecylinder sleeves that are press fitted in the cylinder bores and this isreadily accomplished with a power puller that is effective in engagingthe inner or lower peripheral edge 0f the sleeve prior to exerting anupward power or mechanical pull thereon.

One object of the present invention is to sirnplify the construction andimprove the operation of devices of the character mentioned.

Another object is to provide an improved sleeve puller involvingtiltable adjustable jaws.

Still another object is to provide an improved jaw member for engagingthe lower peripheral edge of a cylinder sleeve prior to extending anupward or outward pull thereon.

A further object is to provide an adjustable sleeve engaging jaw that istiltably connected to a shank for exerting a pull on a sleeve forremoval from its bore in an internal combustion engine and the like.

A still further object is to provide an improved tiltable engaging jawfor sleeve pullers and the like.

Still a further object is to provide a tiltable member having springimpelled jaws thereon for eng-agement with the lower peripheral edge ofa cylinder sleeve.

Other objects and advantages will appear from the following descriptionof an illustrative embodiment of the present invention.

In the drawing:

Figure 1 is a side sectional view in elevation of a cylinder, cylindersleeve, and a sleeve puller embodying features of the present invention.

Figure 2 is a front sectional View in elevation of the structure shownin Figure 1.

Figure 3 is a plan sectional View taken substantially along line III-III of Figure 2.

Figure 4 is a bottom plan vview of the sleeve puller shown in thepreceding figures- Figure 5 is a sectional view taken substantiallyalong line V--V of Figure 1.

Figure 6 is a sectional view taken substantially along line VI--VI ofFigure 5.

'The structure selected for illustration is not intended to serve as alimitation upon the scope or teachings of the invention, but is merelyillustrative thereof. There may be considerable variations andadaptations of all or part of the teachings depending upon the dictatesof commercial practice.

The present embodiment comprises a cylinder or engine block I0 having acylinder bore I I provided therein to receive a somewhat larger sleeveI2 that is press-tted into the cylinder bore II to project therebelow asat I3. The lower peripheral edge I4 of the cylinder sleeve I2 is'usually tapered or chamfered to provide a more or less sharpcircumferential edge I5.

The problem of removing the cylinder sleeve I2 from the cylinder II isrendered rather simple by utilizing a puller that effectively engagesthe lower peripheral edge I5 of the sleeve I2 and exerting an upward oroutward pull thereon by any suitable actuator such as a mechanical screwmember or hydraulic ram of Ia portable type. The specific type ofactuator 'may be varied within a wide range depending upon the dictatesof commercial practice. The actuator is engageable with or constitutes apart of a threaded stud or shank I6 which engages a correspondinglythreaded recess or bore Il provided in a coupler I8 comprising theextremity of a link member I9. The link member I9 terminates, in thisinstance, in an enlarged circular boss 20 which is transversely bored toreceive a threaded pivot pin 2| having -a polygonal recess 22 providedin` an enlarged head 23v thereof.

The pivot 2I projects transversely through spaced furcations 24-25 whichare fitted to receive the boss 20 therebetween. The pivot stud 2|threadedly engages the furcations 24-25 to pivotally support asubstantially rectangular jaw body 26 formed integral with thefurcations 24-25. The jaw body 26 comprises a tangential diametrcalportion of an otherwise circular member and has diametrically disposedjaw receiving guides 21--28 provided therein to receive opposing jawmembers 29-30 that are radially slid-able therein. The limit of radialslidable displacement of the jaws 29-30 within the guides 21--28, isdetermined by pins 3I-32 anchored in the upper surface of the jaws 29-30for registri7 with confronting slots 33-34 provided in the jaw body 26.The jaws 29-30 are normally urged outwardly by means of coil springs35-36 which 38. Thelower jaw plate 38 has an axially tapered aperture 39therein to receive a correspondingly tapered head 40 of a threaded stud4I that engages a correspondingly threaded bore 42 provided within theboss- 31 of the jaw body 26. A hexagonal or other polygonal recess 43 isprovided in the stud head 4U to enable the tightening or looseningthereof with a 'suitable key or wrench. The stud 4I is adjusted totighten or loosen the jaw plate 38 vtol preset the extent of projectionof theradial jaws 25J-30, The jaws 29-30 have inwardly disposed offsets44--45 which present outwardly disposed shiilders 46a-41 that arecapable of engaging a peripheral lower edge I5 of the cylinder sleeveI2.

The offsets 44-45 approach the internal diarneter of the cylinder sleeveI2 so that `the shoulders 46-41 will extend beyond the lower peripheraledge I5 of the sleeve I2. With this arrangement thelj aw body 26 ispivoted at an anglevrelative to the elongated member or shank I9 duringthe insertion thereof for downward displacement through'the cylindersleeve I2 until the jaw body 26 with the-jaws 29-30 are displaced belowthe peripheral sleeve edge I5.A Thereupon, the jaw body 26 will assume ahorizontal position so that the jaws 29-30 with their shoulders 46--41can engage the lowermost peripheral sleeve edge I5. As upward pull isthereafter exerted on the shank member I9 by an actuator of any suitabletype which is attached to the threaded shank I6 to exert a forcerelative to the cylinder block I0 for effecting the removal of thesleeve I2 from the cylinder bore II.

It should be observed that the jaw body 26 need not be tiltable, sincethe jaws 29--30 are spring urged outwards withoutpresetting Ythem sothat a rigidly attached jaw body 26 can be displaced downwardly throughthe cylinder sleeve I2 as shown in dotted outline in Figure 2. When thejaws 29--30 reach a position beneath the d lower peripheral sleeve edgeI5, they are dis-i placed further outwardly by the springs 35-36 toengage the lower peripheral sleeve edge I5. Thereafter, the actuator canbe utilized to effect the upper displacement of the sleeve I2 relativeto the cylinder bore I I to eiect a removal thereof. While we haveillustrated and described a pre; ferred embdifnent of this invention, itmust be understood that the invention iscapable of con= siderablevariation and modification without d'eparting from the spirit of theinvention. We,

therefore, do not wish to be limited to the precise details ofconstruction set forth, but desire to avail ourselves of such variationsand modifications as come within the scope 'of the appended claim.

We lclai-m A sleeve pulling device comprising an elongated shank, a jawbody tiltably associated with said shank for enabling insertion througha sleeve, opposed jaws slidably disposed in said jaw body. spring meansfor normally urging said jaws outwardly to engage the lower peripheraledge of a sleeve, means for limiting the extension of said jaws, anadjustable jaw engaging plate, and means including said adjustable jawengaging plate for maintaining said jaws in a preset extent ofadjustment, said jaw body being a tangential diametrical portion of anotherwise circular member to permit insertion in a sleeve for jawengagement thereunder for the purpose set forth.

GEORGE M. WALRAVEN. RAYMOND G. KNUDSEN.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS

